Publish Chain 138 RPC capability metadata

backend/api/rest/config/metamask/CHAIN138_RPC_CAPABILITIES.json

@@ -0,0 +1,62 @@
+{
+  "name": "Chain 138 RPC Capabilities",
+  "version": {
+    "major": 1,
+    "minor": 0,
+    "patch": 0
+  },
+  "generatedBy": "SolaceScanScout",
+  "timestamp": "2026-03-28T00:00:00Z",
+  "chainId": 138,
+  "chainName": "DeFi Oracle Meta Mainnet",
+  "rpcUrl": "https://rpc-http-pub.d-bis.org",
+  "explorerUrl": "https://explorer.d-bis.org",
+  "explorerApiUrl": "https://explorer.d-bis.org/api/v2",
+  "walletSupport": {
+    "walletAddEthereumChain": true,
+    "walletWatchAsset": true,
+    "notes": [
+      "MetaMask primarily relies on JSON-RPC correctness for balances, gas estimation, calls, and transaction submission.",
+      "Explorer-served network metadata and token list metadata complement wallet UX but do not replace RPC method support."
+    ]
+  },
+  "http": {
+    "supportedMethods": [
+      "web3_clientVersion",
+      "net_version",
+      "eth_chainId",
+      "eth_blockNumber",
+      "eth_syncing",
+      "eth_gasPrice",
+      "eth_feeHistory",
+      "eth_estimateGas",
+      "eth_getCode"
+    ],
+    "unsupportedMethods": [
+      "eth_maxPriorityFeePerGas"
+    ],
+    "notes": [
+      "eth_feeHistory is available for wallet fee estimation.",
+      "eth_maxPriorityFeePerGas is currently not exposed on the public RPC, so some wallets will fall back to simpler fee heuristics."
+    ]
+  },
+  "tracing": {
+    "supportedMethods": [
+      "trace_block",
+      "trace_replayBlockTransactions"
+    ],
+    "unsupportedMethods": [
+      "debug_traceBlockByNumber"
+    ],
+    "notes": [
+      "TRACE support is enabled for explorer-grade indexing and internal transaction analysis.",
+      "Debug tracing is intentionally not enabled on the public RPC tier."
+    ]
+  },
+  "ws": {
+    "notes": [
+      "Use the dedicated public WebSocket endpoint for subscriptions and live wallet/provider events.",
+      "HTTP and WebSocket method coverage should be treated as separate operational surfaces."
+    ]
+  }
+}